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Kenji Sakakibara
Department of Surgery (II), Faculty of Medicine, University of Yamanashi, Japan
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Masahiko Matsumoto
Department of Surgery (II), Faculty of Medicine, University of Yamanashi, Japan
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Shigeaki Kaga
Department of Surgery (II), Faculty of Medicine, University of Yamanashi, Japan
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Shoji Suzuki
Department of Surgery (II), Faculty of Medicine, University of Yamanashi, Japan